Update- Down to 43-44# now, appreciate everyone suggestions and recipes.
Found a local poultry/fish shop and they'll give me 40# leg quarters for $26, which is a heck of a lot cheaper than necks and backs and close to the 80/20 meat/bone ratio.
Felt a little dumb for initally focusing on necks and backs... expecially since I didn't even think of the thyroid still being in there.
I need to get a new standalone freezer to do this right.
I like the 2by recipe, similar to what I'm using now, though I use a lot more celery as it is very low carb and high in fiber. Have also cut out the sweet potato, though I wish I'd followed through with grabbing a bunch of holloween pumpkins.
After dithering on how to best keep the veggies, I'm currently forming them into snowball sized portions and freezing them on a platter, then bagging them in bulk.
Currently giving him a ball in the AM, and then a leg and a ball in PM until I run out of legs. 14 legs for $3.50 seemed like a deal at 0.79/lb.
On the other hand, just read a site about why not to feed chicken as its too high in Omega-6.
https://www.dogsnaturallymagazine.com/raw-chicken-dogs-stopped-feeding/
Note- Her comments seem correct regarding available chicken being very high in Omega 6 with store/free-range chicken having 11-15:1 Omega 6/3 ratios.
We do give a couple of Costco fishoil caps every day, however checking now each one is only 250mg EPA/DHA....
Since chicken fat can contain 20% Omega 6, it definately should be removed along with the skin for a combo fat and omega 6 reduction.
Seems like adding turkey which has a much lower 6:3 ratio, along with mackeral/salmon and some beef occasionally is much healthier than primarily chicken based.
Looking at cod liver oil, probably best not since it has additional A/D which he should be getting more than enough from the veggies. To easy to get the fat soluble A/D to high which cause even worse problems.
I'll just stick to additional EPA/DHA.